They'll have two days off each week. They plan to conduct more than with their psychological and physiological data recorded throughout the mission.

VOA: standard.2010.06.02

"We can get hormone levels, physiological data,disease status."

VOA: standard.2010.02.22

"It's physiological and it's emotional." "Physiologically,we have a tendency when we come into a situation that seems dangerous we get a lot of chemicals flowing through our bodies to help us stay alert, to be able to act if we need to act.

VOA: standard.2010.07.01